Improvement in spring-backs for wagon-seats



, Arms, of which the following is a specificaview.

vertical spring-plates; and D the lazy-back.

UNITED STATES PATENT OF ICE JOHN W. WOOD, or OWATONNA, MINNESOTA, AssreNo TO HIMSELF AND G. SGHOEN, OF

SAME PLACE.

IMPROVEMENT IN SPRING-BACKS FOR WAGON-SEATS.

Specification forming part of Letters Patent No. 186,394, dated January 16, 1877 application filed November 11, 1876.

To all whom it may concern:

Be it known that I, JOHN W. WOOD, of Owatonna, Steele county, Minnesota, have'invented an Improvement in Springs for Gonneoting the Back of aWagon-Seat with the tion:

Figure 1 is a perspective, and Fig. 2 an end The invention will first be described in connection with the drawing, and then pointed out in the claim. l

p A represents the seat; B, the arms; 0, the

The back andarms have hitherto been connected by a curved plate spring, or the arm itself has been made in the shape of a coiled plate spring, or the arm has been made movable, being held by a surrounding coiled spring.

These springs are found in practice to be often fractured in frosty weather by a sudden jar; and in order to avoid this, as well as to make a cheaper spring, I construct this connection E of rubber, making it flat at each having flattened ends clamped between plates to the arms and back, as shown and described. a

JOHN W. WOOD.

Witnesses:

H. E. J OHNSON, W. H. WEBSTER. 

